Answer 1

\[2\pi \times radians=360^{0}\]

Answer 2

Say you wanted to express 270 degrees
270/360 =x/2 pi radians
270(2 pi radians)=360 x
x=(270*2 pi radians)/360
x=1.5 pi radians

Answer 3

I'm sorry. I still dont understand :/

Answer 4

It is a ratio. You memorize a relation between degrees and some value of
I use 2 pi radian = 360 degrees (full circle)
you might prefer pi=180 degrees. then you use the concept of ratios. Comprehende?

Answer 5

Play with it, you will soon "get it"